Dry cell



Patented June 7, 1927 UNITED PATENT Price.

WILLIAM B. HENDRY, QE OSSINING, NEW YORK, ASSIGNORQBY MESNE ASSIGNMENTS, TO NATIONAL CARBON COMPANY, INC., 01? NEW YORK, N. Y., A CORPORATION OF NEW YORK.

DRY CELL.

Application filed January 23, 1924. Serial No. 688,058.

This invention relates to dry cells and more particularly to a novel method of roviding a. separating lining between depo ar- .izin mixtures and anode surfaces. 5 e present invention is in the nature of an improvement on my copendin United States Patent No. 1,597,232, date August 24, 1926, in which a multiple cell is provided with the anodes connected in multlple I and a common cathode, the depolarizing is provided in t e form of a coating adher-' ing to the tablets themselves. This is preferably accomplished by compacting the tablets of alternate layers of wood pulp, or other bibulous material, and depolarizing mixture, the relative quantities being such as to form a coating of bibulous material around the core of depolarizer. Presses are machines for pharmaceutical preparations 1n which a coating of sugar is compacted around a coreof other material and simultaneousl with the compacting thereof.

In t e present case, the coating is accomplished by first delivering a thin layer of granulated'wood pul or other bibulous material, then a relative y heavy layer of finely granulated depolarizing mix and then another thin layer of wood pulp. Then the whole mass is'compacted into a tablet. By bevelling off the edges of'the tablet sufficient wood pulp is forced around the sides to insure the complete coating of the tablet. If desired, the wood pulp may be mixed with flour, starch or the like, to be turned into paste when water is introduced into the cell containing the tablets. Part of the electrolyte may also be mixed with the wood pulp.

The invention will be more clearly underwellknown in the art, e. g., tablet making of zinc washers 5 contacting with the zinc electrode and separated from the depolarizing material by means of the coating of bibulous material 3. A carbon electrode 6 pro- 3ects through the apertures provided in the washers, the openings in the zinc Washers being large enough'to permit free passage of the carbon electrode without contact therewith.

It will be obvious to those skilled in the art that other methods may also be adopted for coating the tablets 1, e. g., they may be dipped in or sprayed with pas.e or a mixture composed of paste, ranulated wood pulp and a part of the e ectrolyte, as described in m copending application Serial No. 688,057, led Jan. 23, 1924.

What I claim is:

1, A dry cell composed of a plurality of tablets compacted of depolarizing and bibulous materials, the latter forming an adhering coating on the former. I

2. A dry cell composed of a plurality of tablets each compacted of alternate layers of depolarizin and bibulous material.

' A dry cel composed of a plurality of compacted tablets each having a covering of bibulous material on a depolarizing core.

4. In a dry cell, a plurality of tablets compacted of depolarizing and bibulous materials, the latter forming an adhering coatin onthe former, an electrode separating ad acent tablets, and a second electrode interconnecting said tablets.

5. In a dry cell, a plurality of tablets compacted of depolarizing and bibulous aterials, the latter forming an adhering coating on the former, a zlnc electrode sepa- 1 rating adjacent tablets, and a carbon elecsaid electrode and separating adjacent tabtrode projecting through said tablets. lets, and a carbon electrode projecting 6. In a dry cell, a zinc container electrode through said tablets. v enclosing a plurality of tablets compacted In testnnony whereof, I have signed my 5 of depolarizing and bibulous materials, the name 1 thls speclfication, this 22nd y of latter forming an adhering coating around January, 1924. r v

the former, zinc washers contactlng with WILLIAM F, HENDRY, 

